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- #ifndef K3DSDK_MESH_SOURCE_H
- #define K3DSDK_MESH_SOURCE_H
-
- // K-3D
- // Copyright (c) 1995-2008, Timothy M. Shead
- //
- // Contact: tshead@k-3d.com
- //
- // This program is free software; you can redistribute it and/or
- // modify it under the terms of the GNU General Public
- // License as published by the Free Software Foundation; either
- // version 2 of the License, or (at your option) any later version.
- //
- // This program is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- // General Public License for more details.
- //
- // You should have received a copy of the GNU General Public
- // License along with this program; if not, write to the Free Software
- // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
- /** \file
- \author Timothy M. Shead (tshead@k-3d.com)
- */
-
- #include "data.h"
- #include "hints.h"
- #include "k3d-i18n-config.h"
- #include "ipipeline_profiler.h"
- #include "imesh_source.h"
- #include "mesh.h"
- #include "pointer_demand_storage.h"
-
- namespace k3d
- {
-
- template<typename base_t>
- class mesh_source :
- public base_t,
- public imesh_source
- {
- public:
- iproperty& mesh_source_output()
- {
- return m_output_mesh;
- }
-
- /// Returns a slot that should be connected to input properties to signal that the output mesh has changed
- sigc::slot<void, ihint*> make_update_mesh_slot()
- {
- return m_output_mesh.make_slot();
- }
-
- protected:
- mesh_source(iplugin_factory& Factory, idocument& Document) :
- base_t(Factory, Document),
- m_output_mesh(init_owner(*this) + init_name("output_mesh") + init_label(_("Output Mesh")) + init_description("Output mesh"))
- {
- m_output_mesh.set_update_slot(sigc::mem_fun(*this, &mesh_source<base_t>::execute));
- }
-
- /// Stores the output mesh, which is created / updated on-demand.
- k3d_data(mesh*, immutable_name, change_signal, no_undo, pointer_demand_storage, no_constraint, read_only_property, no_serialization) m_output_mesh;
-
- private:
- /// Called whenever the output mesh has been modified and needs to be updated.
- void execute(const std::vector<ihint*>& Hints, mesh& Mesh)
- {
- bool_t update_topology = false;
- bool_t update_geometry = false;
-
- for(uint_t i = 0; i != Hints.size(); ++i)
- {
- // Update our geometry ...
- if(dynamic_cast<hint::mesh_geometry_changed*>(Hints[i]))
- {
- update_geometry = true;
- }
- // In all other cases (mesh_topology_changed, unknown hint, or no hint),
- // we must assume the worst and recreate everything from scratch ...
- else
- {
- update_topology = true;
- update_geometry = true;
- break;
- }
- }
-
- if(update_topology)
- {
- base_t::document().pipeline_profiler().start_execution(*this, "Update Topology");
- on_update_mesh_topology(Mesh);
- base_t::document().pipeline_profiler().finish_execution(*this, "Update Topology");
- }
-
- if(update_geometry)
- {
- base_t::document().pipeline_profiler().start_execution(*this, "Update Geometry");
- on_update_mesh_geometry(Mesh);
- base_t::document().pipeline_profiler().finish_execution(*this, "Update Geometry");
- }
- }
-
- /// Implement this in derived classes to setup the topology of the output mesh. Note that the
- /// output mesh is empty the first time this method is called, but will retain its state thereafter,
- /// so implementations must be written to ensure that they don't simply append to the existing state.
- virtual void on_update_mesh_topology(mesh& Output) = 0;
-
- /// Implement this in derived classes to setup the geometry of the output mesh.
- virtual void on_update_mesh_geometry(mesh& Output) = 0;
- };
-
- } // namespace k3d
-
- #endif // !K3DSDK_MESH_SOURCE_H
-
-